const runtime.traceBlockChanSend

3 uses

	runtime (current package)
		chan.go#L283: 	gopark(chanparkcommit, unsafe.Pointer(&c.lock), reason, traceBlockChanSend, 2)
		traceruntime.go#L96: 	traceBlockChanSend
		traceruntime.go#L116: 	traceBlockChanSend:           "chan send",

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